Bhphotovideo offers Pelican Memory Card Case for $14.99 (reg $35.95) with free shipping.

Product Description:
Pelican's 0945 Memory Card Case protects up to 6 of your Compact Flash cards at once! Made the Pelican way - which is to say tougher than tough - this Memory Card Case snugly holds the cards in the removable, shock absorbing liner. Additionally, the water resistant seal (IPx4) ensures that your cards will be safe from moisture, even if the case is submerged in water.

• Stores 6 Compact Flash Cards
• Removable Insert Liner
• Made of Tough Polycarbonate Resin
• Water Resistant IPx4 Seal